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ovs/lib/netdev-dpdk.c
Alex Wang f00fa8cbad netdev: Add n_txq to 'struct netdev'. 
This commit adds new variable n_txq to 'struct netdev' for recording
the number of tx queues.  Correspondingly, the send_*() functions are
extended to accept queue id as input argument.

All 'netdev-*' implementation will ignore the queue id since having
multiple tx queues is not supported.  Upcomping patches will start
using it and create multiple tx queues for dpdk netdev.

Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
2014-09-12 11:30:58 -07:00

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/*
* Copyright (c) 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <pthread.h>
#include <config.h>
#include <errno.h>
#include <sched.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include "dpif-netdev.h"
#include "list.h"
#include "netdev-dpdk.h"
#include "netdev-provider.h"
#include "netdev-vport.h"
#include "odp-util.h"
#include "ofp-print.h"
#include "ofpbuf.h"
#include "ovs-thread.h"
#include "ovs-rcu.h"
#include "packet-dpif.h"
#include "packets.h"
#include "shash.h"
#include "sset.h"
#include "unaligned.h"
#include "timeval.h"
#include "unixctl.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(dpdk);
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
#define DPDK_PORT_WATCHDOG_INTERVAL 5
#define OVS_CACHE_LINE_SIZE CACHE_LINE_SIZE
#define OVS_VPORT_DPDK "ovs_dpdk"
/*
* need to reserve tons of extra space in the mbufs so we can align the
* DMA addresses to 4KB.
*/
#define MTU_TO_MAX_LEN(mtu) ((mtu) + ETHER_HDR_LEN + ETHER_CRC_LEN)
#define MBUF_SIZE(mtu) (MTU_TO_MAX_LEN(mtu) + (512) + \
sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
/* XXX: mempool size should be based on system resources. */
#define NB_MBUF (4096 * 64)
#define MP_CACHE_SZ (256 * 2)
#define SOCKET0 0
#define NON_PMD_THREAD_TX_QUEUE 0
#define NIC_PORT_RX_Q_SIZE 2048 /* Size of Physical NIC RX Queue, Max (n+32<=4096)*/
#define NIC_PORT_TX_Q_SIZE 2048 /* Size of Physical NIC TX Queue, Max (n+32<=4096)*/
/* XXX: Needs per NIC value for these constants. */
#define RX_PTHRESH 32 /* Default values of RX prefetch threshold reg. */
#define RX_HTHRESH 32 /* Default values of RX host threshold reg. */
#define RX_WTHRESH 16 /* Default values of RX write-back threshold reg. */
#define TX_PTHRESH 36 /* Default values of TX prefetch threshold reg. */
#define TX_HTHRESH 0 /* Default values of TX host threshold reg. */
#define TX_WTHRESH 0 /* Default values of TX write-back threshold reg. */
static const struct rte_eth_conf port_conf = {
.rxmode = {
.mq_mode = ETH_MQ_RX_RSS,
.split_hdr_size = 0,
.header_split = 0, /* Header Split disabled */
.hw_ip_checksum = 0, /* IP checksum offload disabled */
.hw_vlan_filter = 0, /* VLAN filtering disabled */
.jumbo_frame = 0, /* Jumbo Frame Support disabled */
.hw_strip_crc = 0,
},
.rx_adv_conf = {
.rss_conf = {
.rss_key = NULL,
.rss_hf = ETH_RSS_IPV4_TCP | ETH_RSS_IPV4 | ETH_RSS_IPV6
| ETH_RSS_IPV4_UDP | ETH_RSS_IPV6_TCP | ETH_RSS_IPV6_UDP,
},
},
.txmode = {
.mq_mode = ETH_MQ_TX_NONE,
},
};
static const struct rte_eth_rxconf rx_conf = {
.rx_thresh = {
.pthresh = RX_PTHRESH,
.hthresh = RX_HTHRESH,
.wthresh = RX_WTHRESH,
},
};
static const struct rte_eth_txconf tx_conf = {
.tx_thresh = {
.pthresh = TX_PTHRESH,
.hthresh = TX_HTHRESH,
.wthresh = TX_WTHRESH,
},
.tx_free_thresh = 0,
.tx_rs_thresh = 0,
.txq_flags = ETH_TXQ_FLAGS_NOMULTSEGS|ETH_TXQ_FLAGS_NOOFFLOADS,
};
enum { MAX_RX_QUEUE_LEN = 192 };
enum { MAX_TX_QUEUE_LEN = 384 };
enum { DPDK_RING_SIZE = 256 };
BUILD_ASSERT_DECL(IS_POW2(DPDK_RING_SIZE));
enum { DRAIN_TSC = 200000ULL };
static int rte_eal_init_ret = ENODEV;
static struct ovs_mutex dpdk_mutex = OVS_MUTEX_INITIALIZER;
/* Contains all 'struct dpdk_dev's. */
static struct list dpdk_list OVS_GUARDED_BY(dpdk_mutex)
= LIST_INITIALIZER(&dpdk_list);
static struct list dpdk_mp_list OVS_GUARDED_BY(dpdk_mutex)
= LIST_INITIALIZER(&dpdk_mp_list);
/* This mutex must be used by non pmd threads when allocating or freeing
* mbufs through mempools. Since dpdk_queue_pkts() and dpdk_queue_flush() may
* use mempools, a non pmd thread should hold this mutex while calling them */
struct ovs_mutex nonpmd_mempool_mutex = OVS_MUTEX_INITIALIZER;
struct dpdk_mp {
struct rte_mempool *mp;
int mtu;
int socket_id;
int refcount;
struct list list_node OVS_GUARDED_BY(dpdk_mutex);
};
struct dpdk_tx_queue {
rte_spinlock_t tx_lock;
int count;
uint64_t tsc;
struct rte_mbuf *burst_pkts[MAX_TX_QUEUE_LEN];
};
/* dpdk has no way to remove dpdk ring ethernet devices
so we have to keep them around once they've been created
*/
static struct list dpdk_ring_list OVS_GUARDED_BY(dpdk_mutex)
= LIST_INITIALIZER(&dpdk_ring_list);
struct dpdk_ring {
/* For the client rings */
struct rte_ring *cring_tx;
struct rte_ring *cring_rx;
int user_port_id; /* User given port no, parsed from port name */
int eth_port_id; /* ethernet device port id */
struct list list_node OVS_GUARDED_BY(dpdk_mutex);
};
struct netdev_dpdk {
struct netdev up;
int port_id;
int max_packet_len;
struct dpdk_tx_queue tx_q[NR_QUEUE];
struct ovs_mutex mutex OVS_ACQ_AFTER(dpdk_mutex);
struct dpdk_mp *dpdk_mp;
int mtu;
int socket_id;
int buf_size;
struct netdev_stats stats_offset;
struct netdev_stats stats;
uint8_t hwaddr[ETH_ADDR_LEN];
enum netdev_flags flags;
struct rte_eth_link link;
int link_reset_cnt;
/* In dpdk_list. */
struct list list_node OVS_GUARDED_BY(dpdk_mutex);
};
struct netdev_rxq_dpdk {
struct netdev_rxq up;
int port_id;
};
static bool thread_is_pmd(void);
static int netdev_dpdk_construct(struct netdev *);
static bool
is_dpdk_class(const struct netdev_class *class)
{
return class->construct == netdev_dpdk_construct;
}
/* XXX: use dpdk malloc for entire OVS. infact huge page shld be used
* for all other sengments data, bss and text. */
static void *
dpdk_rte_mzalloc(size_t sz)
{
void *ptr;
ptr = rte_zmalloc(OVS_VPORT_DPDK, sz, OVS_CACHE_LINE_SIZE);
if (ptr == NULL) {
out_of_memory();
}
return ptr;
}
/* XXX this function should be called only by pmd threads (or by non pmd
* threads holding the nonpmd_mempool_mutex) */
void
free_dpdk_buf(struct dpif_packet *p)
{
struct rte_mbuf *pkt = (struct rte_mbuf *) p;
rte_pktmbuf_free_seg(pkt);
}
static void
__rte_pktmbuf_init(struct rte_mempool *mp,
void *opaque_arg OVS_UNUSED,
void *_m,
unsigned i OVS_UNUSED)
{
struct rte_mbuf *m = _m;
uint32_t buf_len = mp->elt_size - sizeof(struct dpif_packet);
RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct dpif_packet));
memset(m, 0, mp->elt_size);
/* start of buffer is just after mbuf structure */
m->buf_addr = (char *)m + sizeof(struct dpif_packet);
m->buf_physaddr = rte_mempool_virt2phy(mp, m) +
sizeof(struct dpif_packet);
m->buf_len = (uint16_t)buf_len;
/* keep some headroom between start of buffer and data */
m->pkt.data = (char*) m->buf_addr + RTE_MIN(RTE_PKTMBUF_HEADROOM, m->buf_len);
/* init some constant fields */
m->type = RTE_MBUF_PKT;
m->pool = mp;
m->pkt.nb_segs = 1;
m->pkt.in_port = 0xff;
}
static void
ovs_rte_pktmbuf_init(struct rte_mempool *mp,
void *opaque_arg OVS_UNUSED,
void *_m,
unsigned i OVS_UNUSED)
{
struct rte_mbuf *m = _m;
__rte_pktmbuf_init(mp, opaque_arg, _m, i);
ofpbuf_init_dpdk((struct ofpbuf *) m, m->buf_len);
}
static struct dpdk_mp *
dpdk_mp_get(int socket_id, int mtu) OVS_REQUIRES(dpdk_mutex)
{
struct dpdk_mp *dmp = NULL;
char mp_name[RTE_MEMPOOL_NAMESIZE];
LIST_FOR_EACH (dmp, list_node, &dpdk_mp_list) {
if (dmp->socket_id == socket_id && dmp->mtu == mtu) {
dmp->refcount++;
return dmp;
}
}
dmp = dpdk_rte_mzalloc(sizeof *dmp);
dmp->socket_id = socket_id;
dmp->mtu = mtu;
dmp->refcount = 1;
if (snprintf(mp_name, RTE_MEMPOOL_NAMESIZE, "ovs_mp_%d_%d", dmp->mtu,
dmp->socket_id) < 0) {
return NULL;
}
dmp->mp = rte_mempool_create(mp_name, NB_MBUF, MBUF_SIZE(mtu),
MP_CACHE_SZ,
sizeof(struct rte_pktmbuf_pool_private),
rte_pktmbuf_pool_init, NULL,
ovs_rte_pktmbuf_init, NULL,
socket_id, 0);
if (dmp->mp == NULL) {
return NULL;
}
list_push_back(&dpdk_mp_list, &dmp->list_node);
return dmp;
}
static void
dpdk_mp_put(struct dpdk_mp *dmp)
{
if (!dmp) {
return;
}
dmp->refcount--;
ovs_assert(dmp->refcount >= 0);
#if 0
/* I could not find any API to destroy mp. */
if (dmp->refcount == 0) {
list_delete(dmp->list_node);
/* destroy mp-pool. */
}
#endif
}
static void
check_link_status(struct netdev_dpdk *dev)
{
struct rte_eth_link link;
rte_eth_link_get_nowait(dev->port_id, &link);
if (dev->link.link_status != link.link_status) {
netdev_change_seq_changed(&dev->up);
dev->link_reset_cnt++;
dev->link = link;
if (dev->link.link_status) {
VLOG_DBG_RL(&rl, "Port %d Link Up - speed %u Mbps - %s",
dev->port_id, (unsigned)dev->link.link_speed,
(dev->link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
("full-duplex") : ("half-duplex"));
} else {
VLOG_DBG_RL(&rl, "Port %d Link Down", dev->port_id);
}
}
}
static void *
dpdk_watchdog(void *dummy OVS_UNUSED)
{
struct netdev_dpdk *dev;
pthread_detach(pthread_self());
for (;;) {
ovs_mutex_lock(&dpdk_mutex);
LIST_FOR_EACH (dev, list_node, &dpdk_list) {
ovs_mutex_lock(&dev->mutex);
check_link_status(dev);
ovs_mutex_unlock(&dev->mutex);
}
ovs_mutex_unlock(&dpdk_mutex);
xsleep(DPDK_PORT_WATCHDOG_INTERVAL);
}
return NULL;
}
static int
dpdk_eth_dev_init(struct netdev_dpdk *dev) OVS_REQUIRES(dpdk_mutex)
{
struct rte_pktmbuf_pool_private *mbp_priv;
struct ether_addr eth_addr;
int diag;
int i;
if (dev->port_id < 0 || dev->port_id >= rte_eth_dev_count()) {
return ENODEV;
}
diag = rte_eth_dev_configure(dev->port_id, NR_QUEUE, NR_QUEUE, &port_conf);
if (diag) {
VLOG_ERR("eth dev config error %d",diag);
return -diag;
}
for (i = 0; i < NR_QUEUE; i++) {
diag = rte_eth_tx_queue_setup(dev->port_id, i, NIC_PORT_TX_Q_SIZE,
dev->socket_id, &tx_conf);
if (diag) {
VLOG_ERR("eth dev tx queue setup error %d",diag);
return -diag;
}
}
for (i = 0; i < NR_QUEUE; i++) {
diag = rte_eth_rx_queue_setup(dev->port_id, i, NIC_PORT_RX_Q_SIZE,
dev->socket_id,
&rx_conf, dev->dpdk_mp->mp);
if (diag) {
VLOG_ERR("eth dev rx queue setup error %d",diag);
return -diag;
}
}
diag = rte_eth_dev_start(dev->port_id);
if (diag) {
VLOG_ERR("eth dev start error %d",diag);
return -diag;
}
rte_eth_promiscuous_enable(dev->port_id);
rte_eth_allmulticast_enable(dev->port_id);
memset(&eth_addr, 0x0, sizeof(eth_addr));
rte_eth_macaddr_get(dev->port_id, &eth_addr);
VLOG_INFO_RL(&rl, "Port %d: "ETH_ADDR_FMT"",
dev->port_id, ETH_ADDR_ARGS(eth_addr.addr_bytes));
memcpy(dev->hwaddr, eth_addr.addr_bytes, ETH_ADDR_LEN);
rte_eth_link_get_nowait(dev->port_id, &dev->link);
mbp_priv = rte_mempool_get_priv(dev->dpdk_mp->mp);
dev->buf_size = mbp_priv->mbuf_data_room_size - RTE_PKTMBUF_HEADROOM;
dev->flags = NETDEV_UP | NETDEV_PROMISC;
return 0;
}
static struct netdev_dpdk *
netdev_dpdk_cast(const struct netdev *netdev)
{
return CONTAINER_OF(netdev, struct netdev_dpdk, up);
}
static struct netdev *
netdev_dpdk_alloc(void)
{
struct netdev_dpdk *netdev = dpdk_rte_mzalloc(sizeof *netdev);
return &netdev->up;
}
static int
netdev_dpdk_init(struct netdev *netdev_, unsigned int port_no) OVS_REQUIRES(dpdk_mutex)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
int err = 0;
int i;
ovs_mutex_init(&netdev->mutex);
ovs_mutex_lock(&netdev->mutex);
for (i = 0; i < NR_QUEUE; i++) {
rte_spinlock_init(&netdev->tx_q[i].tx_lock);
}
netdev->port_id = port_no;
netdev->flags = 0;
netdev->mtu = ETHER_MTU;
netdev->max_packet_len = MTU_TO_MAX_LEN(netdev->mtu);
/* XXX: need to discover device node at run time. */
netdev->socket_id = SOCKET0;
netdev->dpdk_mp = dpdk_mp_get(netdev->socket_id, netdev->mtu);
if (!netdev->dpdk_mp) {
err = ENOMEM;
goto unlock;
}
err = dpdk_eth_dev_init(netdev);
if (err) {
goto unlock;
}
netdev_->n_txq = NR_QUEUE;
netdev_->n_rxq = NR_QUEUE;
list_push_back(&dpdk_list, &netdev->list_node);
unlock:
ovs_mutex_unlock(&netdev->mutex);
return err;
}
static int
dpdk_dev_parse_name(const char dev_name[], const char prefix[],
unsigned int *port_no)
{
const char *cport;
if (strncmp(dev_name, prefix, strlen(prefix))) {
return ENODEV;
}
cport = dev_name + strlen(prefix);
*port_no = strtol(cport, 0, 0); /* string must be null terminated */
return 0;
}
static int
netdev_dpdk_construct(struct netdev *netdev)
{
unsigned int port_no;
int err;
if (rte_eal_init_ret) {
return rte_eal_init_ret;
}
/* Names always start with "dpdk" */
err = dpdk_dev_parse_name(netdev->name, "dpdk", &port_no);
if (err) {
return err;
}
ovs_mutex_lock(&dpdk_mutex);
err = netdev_dpdk_init(netdev, port_no);
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
static void
netdev_dpdk_destruct(struct netdev *netdev_)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
ovs_mutex_lock(&dev->mutex);
rte_eth_dev_stop(dev->port_id);
ovs_mutex_unlock(&dev->mutex);
ovs_mutex_lock(&dpdk_mutex);
list_remove(&dev->list_node);
dpdk_mp_put(dev->dpdk_mp);
ovs_mutex_unlock(&dpdk_mutex);
ovs_mutex_destroy(&dev->mutex);
}
static void
netdev_dpdk_dealloc(struct netdev *netdev_)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
rte_free(netdev);
}
static int
netdev_dpdk_get_config(const struct netdev *netdev_, struct smap *args)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
ovs_mutex_lock(&dev->mutex);
/* XXX: Allow to configure number of queues. */
smap_add_format(args, "configured_rx_queues", "%u", netdev_->n_rxq);
smap_add_format(args, "configured_tx_queues", "%u", netdev_->n_rxq);
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_numa_id(const struct netdev *netdev_)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
return netdev->socket_id;
}
static struct netdev_rxq *
netdev_dpdk_rxq_alloc(void)
{
struct netdev_rxq_dpdk *rx = dpdk_rte_mzalloc(sizeof *rx);
return &rx->up;
}
static struct netdev_rxq_dpdk *
netdev_rxq_dpdk_cast(const struct netdev_rxq *rx)
{
return CONTAINER_OF(rx, struct netdev_rxq_dpdk, up);
}
static int
netdev_dpdk_rxq_construct(struct netdev_rxq *rxq_)
{
struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_);
struct netdev_dpdk *netdev = netdev_dpdk_cast(rx->up.netdev);
ovs_mutex_lock(&netdev->mutex);
rx->port_id = netdev->port_id;
ovs_mutex_unlock(&netdev->mutex);
return 0;
}
static void
netdev_dpdk_rxq_destruct(struct netdev_rxq *rxq_ OVS_UNUSED)
{
}
static void
netdev_dpdk_rxq_dealloc(struct netdev_rxq *rxq_)
{
struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_);
rte_free(rx);
}
static inline void
dpdk_queue_flush__(struct netdev_dpdk *dev, int qid)
{
struct dpdk_tx_queue *txq = &dev->tx_q[qid];
uint32_t nb_tx = 0;
while (nb_tx != txq->count) {
uint32_t ret;
ret = rte_eth_tx_burst(dev->port_id, qid, txq->burst_pkts + nb_tx,
txq->count - nb_tx);
if (!ret) {
break;
}
nb_tx += ret;
}
if (OVS_UNLIKELY(nb_tx != txq->count)) {
/* free buffers, which we couldn't transmit, one at a time (each
* packet could come from a different mempool) */
int i;
for (i = nb_tx; i < txq->count; i++) {
rte_pktmbuf_free_seg(txq->burst_pkts[i]);
}
ovs_mutex_lock(&dev->mutex);
dev->stats.tx_dropped += txq->count-nb_tx;
ovs_mutex_unlock(&dev->mutex);
}
txq->count = 0;
txq->tsc = rte_get_timer_cycles();
}
static inline void
dpdk_queue_flush(struct netdev_dpdk *dev, int qid)
{
struct dpdk_tx_queue *txq = &dev->tx_q[qid];
if (txq->count == 0) {
return;
}
rte_spinlock_lock(&txq->tx_lock);
dpdk_queue_flush__(dev, qid);
rte_spinlock_unlock(&txq->tx_lock);
}
static int
netdev_dpdk_rxq_recv(struct netdev_rxq *rxq_, struct dpif_packet **packets,
int *c)
{
struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_);
struct netdev *netdev = rx->up.netdev;
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int nb_rx;
dpdk_queue_flush(dev, rxq_->queue_id);
nb_rx = rte_eth_rx_burst(rx->port_id, rxq_->queue_id,
(struct rte_mbuf **) packets,
MIN((int)NETDEV_MAX_RX_BATCH,
(int)MAX_RX_QUEUE_LEN));
if (!nb_rx) {
return EAGAIN;
}
*c = nb_rx;
return 0;
}
inline static void
dpdk_queue_pkts(struct netdev_dpdk *dev, int qid,
struct rte_mbuf **pkts, int cnt)
{
struct dpdk_tx_queue *txq = &dev->tx_q[qid];
uint64_t diff_tsc;
int i = 0;
rte_spinlock_lock(&txq->tx_lock);
while (i < cnt) {
int freeslots = MAX_TX_QUEUE_LEN - txq->count;
int tocopy = MIN(freeslots, cnt-i);
memcpy(&txq->burst_pkts[txq->count], &pkts[i],
tocopy * sizeof (struct rte_mbuf *));
txq->count += tocopy;
i += tocopy;
if (txq->count == MAX_TX_QUEUE_LEN) {
dpdk_queue_flush__(dev, qid);
}
diff_tsc = rte_get_timer_cycles() - txq->tsc;
if (diff_tsc >= DRAIN_TSC) {
dpdk_queue_flush__(dev, qid);
}
}
rte_spinlock_unlock(&txq->tx_lock);
}
/* Tx function. Transmit packets indefinitely */
static void
dpdk_do_tx_copy(struct netdev *netdev, struct dpif_packet ** pkts, int cnt)
OVS_NO_THREAD_SAFETY_ANALYSIS
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct rte_mbuf *mbufs[cnt];
int dropped = 0;
int newcnt = 0;
int i;
/* If we are on a non pmd thread we have to use the mempool mutex, because
* every non pmd thread shares the same mempool cache */
if (!thread_is_pmd()) {
ovs_mutex_lock(&nonpmd_mempool_mutex);
}
for (i = 0; i < cnt; i++) {
int size = ofpbuf_size(&pkts[i]->ofpbuf);
if (OVS_UNLIKELY(size > dev->max_packet_len)) {
VLOG_WARN_RL(&rl, "Too big size %d max_packet_len %d",
(int)size , dev->max_packet_len);
dropped++;
continue;
}
mbufs[newcnt] = rte_pktmbuf_alloc(dev->dpdk_mp->mp);
if (!mbufs[newcnt]) {
dropped += cnt - i;
break;
}
/* We have to do a copy for now */
memcpy(mbufs[newcnt]->pkt.data, ofpbuf_data(&pkts[i]->ofpbuf), size);
rte_pktmbuf_data_len(mbufs[newcnt]) = size;
rte_pktmbuf_pkt_len(mbufs[newcnt]) = size;
newcnt++;
}
if (OVS_UNLIKELY(dropped)) {
ovs_mutex_lock(&dev->mutex);
dev->stats.tx_dropped += dropped;
ovs_mutex_unlock(&dev->mutex);
}
dpdk_queue_pkts(dev, NON_PMD_THREAD_TX_QUEUE, mbufs, newcnt);
dpdk_queue_flush(dev, NON_PMD_THREAD_TX_QUEUE);
if (!thread_is_pmd()) {
ovs_mutex_unlock(&nonpmd_mempool_mutex);
}
}
static int
netdev_dpdk_send(struct netdev *netdev, int qid, struct dpif_packet **pkts,
int cnt, bool may_steal)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int ret;
int i;
if (!may_steal || pkts[0]->ofpbuf.source != OFPBUF_DPDK) {
dpdk_do_tx_copy(netdev, pkts, cnt);
if (may_steal) {
for (i = 0; i < cnt; i++) {
dpif_packet_delete(pkts[i]);
}
}
} else {
int next_tx_idx = 0;
int dropped = 0;
qid = rte_lcore_id() % NR_QUEUE;
for (i = 0; i < cnt; i++) {
int size = ofpbuf_size(&pkts[i]->ofpbuf);
if (OVS_UNLIKELY(size > dev->max_packet_len)) {
if (next_tx_idx != i) {
dpdk_queue_pkts(dev, qid,
(struct rte_mbuf **)&pkts[next_tx_idx],
i-next_tx_idx);
}
VLOG_WARN_RL(&rl, "Too big size %d max_packet_len %d",
(int)size , dev->max_packet_len);
dpif_packet_delete(pkts[i]);
dropped++;
next_tx_idx = i + 1;
}
}
if (next_tx_idx != cnt) {
dpdk_queue_pkts(dev, qid,
(struct rte_mbuf **)&pkts[next_tx_idx],
cnt-next_tx_idx);
}
if (OVS_UNLIKELY(dropped)) {
ovs_mutex_lock(&dev->mutex);
dev->stats.tx_dropped += dropped;
ovs_mutex_unlock(&dev->mutex);
}
}
ret = 0;
return ret;
}
static int
netdev_dpdk_set_etheraddr(struct netdev *netdev,
const uint8_t mac[ETH_ADDR_LEN])
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
if (!eth_addr_equals(dev->hwaddr, mac)) {
memcpy(dev->hwaddr, mac, ETH_ADDR_LEN);
netdev_change_seq_changed(netdev);
}
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_etheraddr(const struct netdev *netdev,
uint8_t mac[ETH_ADDR_LEN])
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
memcpy(mac, dev->hwaddr, ETH_ADDR_LEN);
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_mtu(const struct netdev *netdev, int *mtup)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
*mtup = dev->mtu;
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_set_mtu(const struct netdev *netdev, int mtu)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int old_mtu, err;
struct dpdk_mp *old_mp;
struct dpdk_mp *mp;
ovs_mutex_lock(&dpdk_mutex);
ovs_mutex_lock(&dev->mutex);
if (dev->mtu == mtu) {
err = 0;
goto out;
}
mp = dpdk_mp_get(dev->socket_id, dev->mtu);
if (!mp) {
err = ENOMEM;
goto out;
}
rte_eth_dev_stop(dev->port_id);
old_mtu = dev->mtu;
old_mp = dev->dpdk_mp;
dev->dpdk_mp = mp;
dev->mtu = mtu;
dev->max_packet_len = MTU_TO_MAX_LEN(dev->mtu);
err = dpdk_eth_dev_init(dev);
if (err) {
dpdk_mp_put(mp);
dev->mtu = old_mtu;
dev->dpdk_mp = old_mp;
dev->max_packet_len = MTU_TO_MAX_LEN(dev->mtu);
dpdk_eth_dev_init(dev);
goto out;
}
dpdk_mp_put(old_mp);
netdev_change_seq_changed(netdev);
out:
ovs_mutex_unlock(&dev->mutex);
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
static int
netdev_dpdk_get_carrier(const struct netdev *netdev_, bool *carrier);
static int
netdev_dpdk_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct rte_eth_stats rte_stats;
bool gg;
netdev_dpdk_get_carrier(netdev, &gg);
ovs_mutex_lock(&dev->mutex);
rte_eth_stats_get(dev->port_id, &rte_stats);
*stats = dev->stats_offset;
stats->rx_packets += rte_stats.ipackets;
stats->tx_packets += rte_stats.opackets;
stats->rx_bytes += rte_stats.ibytes;
stats->tx_bytes += rte_stats.obytes;
stats->rx_errors += rte_stats.ierrors;
stats->tx_errors += rte_stats.oerrors;
stats->multicast += rte_stats.imcasts;
stats->tx_dropped += dev->stats.tx_dropped;
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
dev->stats_offset = *stats;
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_features(const struct netdev *netdev_,
enum netdev_features *current,
enum netdev_features *advertised OVS_UNUSED,
enum netdev_features *supported OVS_UNUSED,
enum netdev_features *peer OVS_UNUSED)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
struct rte_eth_link link;
ovs_mutex_lock(&dev->mutex);
link = dev->link;
ovs_mutex_unlock(&dev->mutex);
if (link.link_duplex == ETH_LINK_AUTONEG_DUPLEX) {
if (link.link_speed == ETH_LINK_SPEED_AUTONEG) {
*current = NETDEV_F_AUTONEG;
}
} else if (link.link_duplex == ETH_LINK_HALF_DUPLEX) {
if (link.link_speed == ETH_LINK_SPEED_10) {
*current = NETDEV_F_10MB_HD;
}
if (link.link_speed == ETH_LINK_SPEED_100) {
*current = NETDEV_F_100MB_HD;
}
if (link.link_speed == ETH_LINK_SPEED_1000) {
*current = NETDEV_F_1GB_HD;
}
} else if (link.link_duplex == ETH_LINK_FULL_DUPLEX) {
if (link.link_speed == ETH_LINK_SPEED_10) {
*current = NETDEV_F_10MB_FD;
}
if (link.link_speed == ETH_LINK_SPEED_100) {
*current = NETDEV_F_100MB_FD;
}
if (link.link_speed == ETH_LINK_SPEED_1000) {
*current = NETDEV_F_1GB_FD;
}
if (link.link_speed == ETH_LINK_SPEED_10000) {
*current = NETDEV_F_10GB_FD;
}
}
return 0;
}
static int
netdev_dpdk_get_ifindex(const struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int ifindex;
ovs_mutex_lock(&dev->mutex);
ifindex = dev->port_id;
ovs_mutex_unlock(&dev->mutex);
return ifindex;
}
static int
netdev_dpdk_get_carrier(const struct netdev *netdev_, bool *carrier)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
ovs_mutex_lock(&dev->mutex);
check_link_status(dev);
*carrier = dev->link.link_status;
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static long long int
netdev_dpdk_get_carrier_resets(const struct netdev *netdev_)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
long long int carrier_resets;
ovs_mutex_lock(&dev->mutex);
carrier_resets = dev->link_reset_cnt;
ovs_mutex_unlock(&dev->mutex);
return carrier_resets;
}
static int
netdev_dpdk_set_miimon(struct netdev *netdev_ OVS_UNUSED,
long long int interval OVS_UNUSED)
{
return 0;
}
static int
netdev_dpdk_update_flags__(struct netdev_dpdk *dev,
enum netdev_flags off, enum netdev_flags on,
enum netdev_flags *old_flagsp) OVS_REQUIRES(dev->mutex)
{
int err;
if ((off | on) & ~(NETDEV_UP | NETDEV_PROMISC)) {
return EINVAL;
}
*old_flagsp = dev->flags;
dev->flags |= on;
dev->flags &= ~off;
if (dev->flags == *old_flagsp) {
return 0;
}
if (dev->flags & NETDEV_UP) {
err = rte_eth_dev_start(dev->port_id);
if (err)
return -err;
}
if (dev->flags & NETDEV_PROMISC) {
rte_eth_promiscuous_enable(dev->port_id);
}
if (!(dev->flags & NETDEV_UP)) {
rte_eth_dev_stop(dev->port_id);
}
return 0;
}
static int
netdev_dpdk_update_flags(struct netdev *netdev_,
enum netdev_flags off, enum netdev_flags on,
enum netdev_flags *old_flagsp)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
int error;
ovs_mutex_lock(&netdev->mutex);
error = netdev_dpdk_update_flags__(netdev, off, on, old_flagsp);
ovs_mutex_unlock(&netdev->mutex);
return error;
}
static int
netdev_dpdk_get_status(const struct netdev *netdev_, struct smap *args)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
struct rte_eth_dev_info dev_info;
if (dev->port_id < 0)
return ENODEV;
ovs_mutex_lock(&dev->mutex);
rte_eth_dev_info_get(dev->port_id, &dev_info);
ovs_mutex_unlock(&dev->mutex);
smap_add_format(args, "driver_name", "%s", dev_info.driver_name);
smap_add_format(args, "port_no", "%d", dev->port_id);
smap_add_format(args, "numa_id", "%d", rte_eth_dev_socket_id(dev->port_id));
smap_add_format(args, "driver_name", "%s", dev_info.driver_name);
smap_add_format(args, "min_rx_bufsize", "%u", dev_info.min_rx_bufsize);
smap_add_format(args, "max_rx_pktlen", "%u", dev_info.max_rx_pktlen);
smap_add_format(args, "max_rx_queues", "%u", dev_info.max_rx_queues);
smap_add_format(args, "max_tx_queues", "%u", dev_info.max_tx_queues);
smap_add_format(args, "max_mac_addrs", "%u", dev_info.max_mac_addrs);
smap_add_format(args, "max_hash_mac_addrs", "%u", dev_info.max_hash_mac_addrs);
smap_add_format(args, "max_vfs", "%u", dev_info.max_vfs);
smap_add_format(args, "max_vmdq_pools", "%u", dev_info.max_vmdq_pools);
smap_add_format(args, "pci-vendor_id", "0x%u", dev_info.pci_dev->id.vendor_id);
smap_add_format(args, "pci-device_id", "0x%x", dev_info.pci_dev->id.device_id);
return 0;
}
static void
netdev_dpdk_set_admin_state__(struct netdev_dpdk *dev, bool admin_state)
OVS_REQUIRES(dev->mutex)
{
enum netdev_flags old_flags;
if (admin_state) {
netdev_dpdk_update_flags__(dev, 0, NETDEV_UP, &old_flags);
} else {
netdev_dpdk_update_flags__(dev, NETDEV_UP, 0, &old_flags);
}
}
static void
netdev_dpdk_set_admin_state(struct unixctl_conn *conn, int argc,
const char *argv[], void *aux OVS_UNUSED)
{
bool up;
if (!strcasecmp(argv[argc - 1], "up")) {
up = true;
} else if ( !strcasecmp(argv[argc - 1], "down")) {
up = false;
} else {
unixctl_command_reply_error(conn, "Invalid Admin State");
return;
}
if (argc > 2) {
struct netdev *netdev = netdev_from_name(argv[1]);
if (netdev && is_dpdk_class(netdev->netdev_class)) {
struct netdev_dpdk *dpdk_dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dpdk_dev->mutex);
netdev_dpdk_set_admin_state__(dpdk_dev, up);
ovs_mutex_unlock(&dpdk_dev->mutex);
netdev_close(netdev);
} else {
unixctl_command_reply_error(conn, "Not a DPDK Interface");
netdev_close(netdev);
return;
}
} else {
struct netdev_dpdk *netdev;
ovs_mutex_lock(&dpdk_mutex);
LIST_FOR_EACH (netdev, list_node, &dpdk_list) {
ovs_mutex_lock(&netdev->mutex);
netdev_dpdk_set_admin_state__(netdev, up);
ovs_mutex_unlock(&netdev->mutex);
}
ovs_mutex_unlock(&dpdk_mutex);
}
unixctl_command_reply(conn, "OK");
}
static void
dpdk_common_init(void)
{
unixctl_command_register("netdev-dpdk/set-admin-state",
"[netdev] up|down", 1, 2,
netdev_dpdk_set_admin_state, NULL);
ovs_thread_create("dpdk_watchdog", dpdk_watchdog, NULL);
}
static int
dpdk_class_init(void)
{
int result;
result = rte_eal_pci_probe();
if (result) {
VLOG_ERR("Cannot probe PCI");
return -result;
}
VLOG_INFO("Ethernet Device Count: %d", (int)rte_eth_dev_count());
return 0;
}
/* Client Rings */
static int
dpdk_ring_create(const char dev_name[], unsigned int port_no,
unsigned int *eth_port_id)
{
struct dpdk_ring *ivshmem;
char ring_name[10];
int err;
ivshmem = dpdk_rte_mzalloc(sizeof *ivshmem);
if (ivshmem == NULL) {
return ENOMEM;
}
err = snprintf(ring_name, 10, "%s_tx", dev_name);
if (err < 0) {
return -err;
}
ivshmem->cring_tx = rte_ring_create(ring_name, DPDK_RING_SIZE, SOCKET0, 0);
if (ivshmem->cring_tx == NULL) {
rte_free(ivshmem);
return ENOMEM;
}
err = snprintf(ring_name, 10, "%s_rx", dev_name);
if (err < 0) {
return -err;
}
ivshmem->cring_rx = rte_ring_create(ring_name, DPDK_RING_SIZE, SOCKET0, 0);
if (ivshmem->cring_rx == NULL) {
rte_free(ivshmem);
return ENOMEM;
}
err = rte_eth_from_rings(dev_name, &ivshmem->cring_rx, 1,
&ivshmem->cring_tx, 1, SOCKET0);
if (err < 0) {
rte_free(ivshmem);
return ENODEV;
}
ivshmem->user_port_id = port_no;
ivshmem->eth_port_id = rte_eth_dev_count() - 1;
list_push_back(&dpdk_ring_list, &ivshmem->list_node);
*eth_port_id = ivshmem->eth_port_id;
return 0;
}
static int
dpdk_ring_open(const char dev_name[], unsigned int *eth_port_id) OVS_REQUIRES(dpdk_mutex)
{
struct dpdk_ring *ivshmem;
unsigned int port_no;
int err = 0;
/* Names always start with "dpdkr" */
err = dpdk_dev_parse_name(dev_name, "dpdkr", &port_no);
if (err) {
return err;
}
/* look through our list to find the device */
LIST_FOR_EACH (ivshmem, list_node, &dpdk_ring_list) {
if (ivshmem->user_port_id == port_no) {
VLOG_INFO("Found dpdk ring device %s:\n", dev_name);
*eth_port_id = ivshmem->eth_port_id; /* really all that is needed */
return 0;
}
}
/* Need to create the device rings */
return dpdk_ring_create(dev_name, port_no, eth_port_id);
}
static int
netdev_dpdk_ring_construct(struct netdev *netdev)
{
unsigned int port_no = 0;
int err = 0;
if (rte_eal_init_ret) {
return rte_eal_init_ret;
}
ovs_mutex_lock(&dpdk_mutex);
err = dpdk_ring_open(netdev->name, &port_no);
if (err) {
goto unlock_dpdk;
}
err = netdev_dpdk_init(netdev, port_no);
unlock_dpdk:
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
#define NETDEV_DPDK_CLASS(NAME, INIT, CONSTRUCT) \
{ \
NAME, \
INIT, /* init */ \
NULL, /* netdev_dpdk_run */ \
NULL, /* netdev_dpdk_wait */ \
\
netdev_dpdk_alloc, \
CONSTRUCT, \
netdev_dpdk_destruct, \
netdev_dpdk_dealloc, \
netdev_dpdk_get_config, \
NULL, /* netdev_dpdk_set_config */ \
NULL, /* get_tunnel_config */ \
netdev_dpdk_get_numa_id, /* get_numa_id */ \
\
netdev_dpdk_send, /* send */ \
NULL, /* send_wait */ \
\
netdev_dpdk_set_etheraddr, \
netdev_dpdk_get_etheraddr, \
netdev_dpdk_get_mtu, \
netdev_dpdk_set_mtu, \
netdev_dpdk_get_ifindex, \
netdev_dpdk_get_carrier, \
netdev_dpdk_get_carrier_resets, \
netdev_dpdk_set_miimon, \
netdev_dpdk_get_stats, \
netdev_dpdk_set_stats, \
netdev_dpdk_get_features, \
NULL, /* set_advertisements */ \
\
NULL, /* set_policing */ \
NULL, /* get_qos_types */ \
NULL, /* get_qos_capabilities */ \
NULL, /* get_qos */ \
NULL, /* set_qos */ \
NULL, /* get_queue */ \
NULL, /* set_queue */ \
NULL, /* delete_queue */ \
NULL, /* get_queue_stats */ \
NULL, /* queue_dump_start */ \
NULL, /* queue_dump_next */ \
NULL, /* queue_dump_done */ \
NULL, /* dump_queue_stats */ \
\
NULL, /* get_in4 */ \
NULL, /* set_in4 */ \
NULL, /* get_in6 */ \
NULL, /* add_router */ \
NULL, /* get_next_hop */ \
netdev_dpdk_get_status, \
NULL, /* arp_lookup */ \
\
netdev_dpdk_update_flags, \
\
netdev_dpdk_rxq_alloc, \
netdev_dpdk_rxq_construct, \
netdev_dpdk_rxq_destruct, \
netdev_dpdk_rxq_dealloc, \
netdev_dpdk_rxq_recv, \
NULL, /* rx_wait */ \
NULL, /* rxq_drain */ \
}
int
dpdk_init(int argc, char **argv)
{
int result;
if (argc < 2 || strcmp(argv[1], "--dpdk"))
return 0;
/* Make sure program name passed to rte_eal_init() is vswitchd. */
argv[1] = argv[0];
argc--;
argv++;
/* Make sure things are initialized ... */
result = rte_eal_init(argc, argv);
if (result < 0) {
ovs_abort(result, "Cannot init EAL\n");
}
rte_memzone_dump(stdout);
rte_eal_init_ret = 0;
if (argc > result) {
argv[result] = argv[0];
}
/* We are called from the main thread here */
thread_set_nonpmd();
return result + 1;
}
const struct netdev_class dpdk_class =
NETDEV_DPDK_CLASS(
"dpdk",
dpdk_class_init,
netdev_dpdk_construct);
const struct netdev_class dpdk_ring_class =
NETDEV_DPDK_CLASS(
"dpdkr",
NULL,
netdev_dpdk_ring_construct);
void
netdev_dpdk_register(void)
{
static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
if (rte_eal_init_ret) {
return;
}
if (ovsthread_once_start(&once)) {
dpdk_common_init();
netdev_register_provider(&dpdk_class);
netdev_register_provider(&dpdk_ring_class);
ovsthread_once_done(&once);
}
}
int
pmd_thread_setaffinity_cpu(int cpu)
{
cpu_set_t cpuset;
int err;
CPU_ZERO(&cpuset);
CPU_SET(cpu, &cpuset);
err = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
if (err) {
VLOG_ERR("Thread affinity error %d",err);
return err;
}
/* lcore_id 0 is reseved for use by non pmd threads. */
RTE_PER_LCORE(_lcore_id) = cpu + 1;
return 0;
}
void
thread_set_nonpmd(void)
{
/* We cannot have RTE_MAX_LCORE pmd threads, because lcore_id 0 is reserved
* for non pmd threads */
BUILD_ASSERT(NR_PMD_THREADS < RTE_MAX_LCORE);
/* We have to use 0 to allow non pmd threads to perform certain DPDK
* operations, like rte_eth_dev_configure(). */
RTE_PER_LCORE(_lcore_id) = 0;
}
static bool
thread_is_pmd(void)
{
return rte_lcore_id() != 0;
}
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